Rx If Connections - Comtech EF Data CDD-562AL Installation And Operation Manual

CDD-562AL/564A/L Multi-Channel Demodulator
Rear Panel Connections
3.2.1

Rx IF Connections

3.2.1.1 CDD-562AL and CDD-564AL L-Band Chassis Rx Input
CAUTION
DC voltages can be present on the Type N Rx IF connectors, up to a maximum of 18 volts.
The Rx IF input port connectors on the L-Band demodulators are 50Ω N female types. The return loss on
these ports is typically better than 17 dB.
To connect to a 75Ω system, use an inexpensive N to F type adapter. The adapter is available as an
optional accessory. This setup will cause a slight reduction in return loss. The effect on most systems is
minimal.
The CDD-562AL has two connectors labeled Rx1 and Rx2.
The CDD-564AL has four connectors labeled Rx 1, Rx 2, Rx 3 and Rx 4.
3.2.1.2 CDD-564A 70/140 MHz IF Chassis Rx Input
CAUTION
DC voltages can be present on the BNC Rx IF connectors, up to a maximum of 18 volts.
The Rx IF input port connectors on the 70/140 MHz IF demodulators are BNC female types. The return
loss on these ports is typically better than 17 dB for both 50Ω and 75Ω systems.
The CDD-564A has four BNC connectors labeled Rx 1, Rx 2, Rx 3 and Rx 4.
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MN-CDD562AL564AL